Hypodermic syringe.



No. 819,330. PATENTED MAY l, 1906.

0. A. YCAZA. HYPODERMIO SYRINGE.

APPLICATION FILED JUNE 10, 1905.

gavin j lp ATTRNEYS q UNT-TED sTATEs PATENT OEEIOE. A

HYPODERM IC SYRINGE.

Application filed June 10,

To all whom t may concern:

Be it known that I, OsvALDo AUGUSTO YOAZA, a citizen of the Republic of Panama, residing in the city of Guatemala, Department of Guatemala, Guatemala, have invented a new and useful lm rovement in Hypodermic Syringes, of which the following is a specification.

This invention relates generally to hypodermic syringes, the object being to provide a simple and efficient form of syringe in which the parts-are put together without the use of threads.

Another object of the invention is to provide a syringe in which the said parts can be quickly and easily assembled or disconnected.

With these objects in view the invention consists in the novel features of construction hereinafter fully described, and pointed out in the claims.

In the drawings forming a part of this s vecification, Figure l is a perspective view o the syringe constructed .in accordance with my invention. Fig..2 is a vertical sectional view of the same. Fig. 3 is a section on the line 3 3 of Fig. 2. Fig. 4 is a section on the line 4 4 of Fig. 2. Fig. 5 is a section on the line 5 5 of Fig. 2. Fig. 6 is a section on the line 6 6 .of Fig. 2. Fig. 7 is a section on the line 7 7 of Fig. 2. Figs. 8, 9, and 10 show details of construction.

ln carrying out my invention, l employ a glass tube A, in which works the piston B, which is attached to the piston-rod O by means of a key B', pivoted to the bottom of the piston and adapted to engage the notch O',d produced in the rod adjacent its lower en The knob or handle D rests upon a shoulder O2 and is secured bymeans of a key D', entering a recess D2., produced in the upper end of the piston-rod.

It will be understood, of course, that the knob or handle is not arranged upon the upper end of the piston-rod until the parts have been assembled. The lower end of the glass tube A rests upon the hard-rubber washer E, the upper face of which is grooved to receive the lower end of the tube. This washer E fits upon the metallic disk F, carrying the nozzle or point F. lt also carries a central protub erance F2, upon which the hard-rubber washer E fits, as most clearly shown in Fig. 2.

The upper end of the tube bears upon a Specification of Letters Patent.

Patented May 1, 1906.

T905. Serial No. 264.714.

AWasher G, arranged upon a metal disk H, which also has a central depending ortion H', upon which the washer fits, and t `s disk is apertured, as shown at H2, and through which the piston-rod O passes. The disk H has a plurality of. T-shaped notches l cut therein at e uidistant points upon the circumference, and the disk F has a small number of notches K produced therein and also arranged at equidistant oints. These notches are produced in the e ges of the disks to receive ,the bars L, which have T-shaped heads L at their up er and lower ends, said heads being adaptedp to contact with the upper and lower faces, respectively, of the upper and lower disks, as most clearly shown in Figs. 1 and 2. The disk H is somewhat larger in circumference than the disk F, and the bars L are constructed of spring metal, and for the purpose of causing the heads of the bars to be bound tightly against the disks, and thereby hold all of the parts in theirproper ositions, I employ a clamping-ring Mhaving aterallyprojecting handles M This ring M surrounds the bars L, and by forcing the same upwardly upon said bars they are caused to bend, as shown in Fig. 2, thereby drawing tightly upon the disks and binding all ofthe parts close together.

described can be put together or taken apart in an exceedingly short space of time, and owing to the fact that no threads are employed there are no parts to become impaired, and, furthermore, 1t will be seen that all of the parts can be quickly and easily cleansed whenever desired.

Having thus fully described my invention, r what I claim as new, and desire to secure by Letters Patent, is l. A hypodermic syringe comprising a tube, disks closing the ends of the tube, a piston, a piston-rod working through one of said disks, spring-metal bars connecting the disks, and a ring slidable on said bars and adapted to compress the bars and hold the disks in position.

2. A-syringe comprising a tube and washers at the ends thereof, disks carrying said washers, bars connecting the disks, and a clamping-ring movable upon said bars to increase and decrease their tension upon the disks, as set forth.

3. Asyringe of the kind described compris- A syringe constructed as herein shown and IOO inga glass tube havingapistonworking therering embracing the said barsv and niovabIe in, said piston being detachable from the rod, thereon, all of said parts being arranged and the Washers against which the ends of the adapted to operate as set forth.

tube bear, the disks Carrying said Washers, OSVALDO AUGUSTO YOAZA. said disks being notched at their edges, the Witnesses: bars engaging said notches and having heads I J UAN RODOLFO SNCHEZ,

adapted to engage the disks, the elampingf JUAN JOS PREZ. 

